Furnace-grate.



l'. VAN HECK.

FURNCE (5R/WE.

APPUCATION msn MAR. is, 19u` Patente/,f5

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f n fl' fhl' L? J. JAN VLECK.

FURNACE GRATE. y APPLICATION FILED MAR. sa. 1915.

5 SHEETS-SHEET 2.

J. VAN VLECK.

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L VAN VLECK.

VFURNACE GQATE` APPLICATION man :v1/mns. |915.

ggmgej, l Mama me. 7, 1915.

5 SHEETS-SHEET 4.

ma f v Sil j. VAN VLECK.

FURNACE GRTE.

mwucmlon man MAR. 18. 1915,

Patefued Bec. 7, N15.

"entran sacarse JOHN VAN vissen, or New, Yoan, N. Y., assiettes. ro Lnwre e. srrnnwsnix, or

Lannwoon, 'New Jnnsnr'.

.'EURNACEGRATE.

Specification of Letters Patent.

v l e atenten a, lo

To all ywhom t may concern.'

Be it known that l, JOHN VAN VLECK, a citizen of the United States, residing at New York, county and State of New York, have inventedcertain new1 and useful linprovernents in llurnace-Grates, of which the following` is a full, clear, and exact description.

This invention relates to furnace grates, especially gratos of the traveling belt type, and its object is to`i1nprove the saine in various particulars.

A further object is to provide an irnproved system oit air supply, whereby the delivery of air to the burning fuel can be easily and effectively controlled.

To these and other ends the invention consists in the novel features of construction and combinations of elements hereinafter described.

011e of the various forms in which the invention can be embodied is illustrated in the accompanying drawings, in which- Figure l is a vertical longitudinal section taken at about the center of the i'urnace, showing the traveling grate, the upper air-chambers or compartments between the upper' and lower reaches of the grate, and the lower aircharnber below the lower reach. Figs. 2 and 3 are cross sections (on a larger scale) taken substantially on the planes indicated by the lines 2-2 and 3 3 of Fig. l. Fig. et is a plan view of a grate top or top-plate of the preferred type, and Fig. 5 is a side view of the saine. Fig. 6 is a detail front view, partly in vertical section, of one of the grate carrier-bars with several top-plates thereon. Figs. 7 and 8 are detail cross sections on line ZA- 7 and 8-*8, respectively, of Fig. 6.

Referring first to Figs. l and 2, 10 designates the lire or grate-chamber, having an arched root l1, and at its front a mouth 12 for the introduction of fuel.- Any suitable fuel-feeding and regulating apparatus can be used, preferably that described in iny coending application liled February '20th,

er. No. 9,482. The traveling grate 13, of'

the belt type, moves from front to rear (from left to right in Fig., l) over two outer or frontsprockets 14 on a transverse sliait le? and two rear or inner sprockets 15 oi Ittransverse shaft y15", the outer sprockets beilegen thepresent instance the larger.

Either. `or both pairs of sprockets can be driven by any suitable mechanism, not shown. llhe upper reach of the is preferably inclined downwardly and rearwardly, and the reaches are supported at the sides, to prevent sagging, by upper and lower anglesiron rails 16, l?. etween the two reaches is an upper air-cliainber 'i8 divided by a vertical transverse wall 19 into front and rear air-compartments 20, 2l, re-

spectively, receiving1 air, through lateral openings 22, 23, from a lower air-cli: meer 2d which-in turn receives air i'roin a i or blower (not shown) ay/way of an air-duct Below and at the roar of the upper reach f of the traveling grate i3 is an inner aircompartinent 29, having a -iront wall 29a. The bottoni is formed. a lower stationary grid 3G,v and an upper movable grid so by shifting the latter the supply of air to the chamber, and hence to tbe on the rear end ofthe grate, can be accurately regulated. Preferably the movable grid made in a plurality of independently adjustable parts or sections; as ior example three, a

wide central section 3l and two narrower lateral sections 32, by which the more air per unit grateerea can be delivered to the center' than to tlie sides oit the grataor vice versa7 the three sections being separated by longitudinal walls or partitions 29D which divide the chamber into tliree separate cells. To shift the center section, it' is provided with lugs 33, connected by rods te to arms 35 on transverse roclr shaft Btl 'iront or" the chamber 29,-only one rod and one arinl being shown. The left` grid-section (lig.v 3) is similarly connected to an arrn 37, Fig;

'1, on the transverse shaft 38, and a like arm.A

v(not shown) is provided on the saine shaft to operate the right-hand section. .l have not considered. it necessary to illustrate any i particular incans'tor rocking; the shafts 36 and l38. lt is to be 'understood that 'the invention, in respect tothe ,grid-damper euse just described, is by no means limiied to the location shown, thai isa ai; 'the extreme inner end oit the grate, 1101 to any particular size of dempei.

To diminish leakage of sii iom elle iippei siiehsiiihei: to the outside and from one sii:-

mipsitinent to enothei, the 'brensveif'se Weils provided theii ops with "'Lsiisverse plates psialiel with and close to @he underside oi? die uppei reach o' the geste. The i'oiit rem edges of @hess pluies sie hem cicsviiweidl'y is shows, se avoid sil possibility of eifel-ence with moving peet-s of hhs T he hop of ehe ist@ een he ifoiiiied oi2 lenig and narrow 'bei i she so-eailed pianohey tyge, out l prefei to use plates of the kind shown et 4:0 in Figs. 4, 5 and 3. These seo castings provided with suitable sii-open iisgs, endet he sides are formed with depending iiiis er flanges il for se'sehment to @bhe gime-top ouriiei hers heiesicei deseiihc l. @il one sise of esoh plate s ei' hesi- -Ulie iop is a, i'h i2 and 01o Aehe oshe4 side nem' oi' :it the bottom a similia' i'ih Q3, so time when e seiies of the top-pistes i' 0j aie-'impe er@ mi'eiiged side by side'en she carrier hsifs she ,iihs Wiif Ove/ship eig/eh oi-hei zii. he siiy so as te pie'veiib leal; ge fuel sigilli he spliced Tim* ei'isiifrh spe-ift on zo S 7 theemb, and

to prevent jamming' as the geio pas;

sroolieis and co i'iiiiiimize eiwding gfowth ei expansion @it "ehe pistes hy 'iiei' s' similar Qiiipose she ends of the grate'- ovefln'p ss shown in Fig. L

hoiiew' gi-saisie@ sessies-hess ed T) are douhie-miied e: `s

1 weils, streng nel. his oi1 'lehg'es 'vese Webs emily s'bsched 'm *bhe l of y sheivii in end 63 ii, is ihm, bhe hei is comme ci: by e oependiiig meme reef end to the hai end ef" als sloeg; izhe sides she top ma equipped with 'from ein engagement with imde'soiit iiogohes mi iii ghe grate-iop vi/hs er fins 41, clearly shewii in l pei'iiiiitiiig he grate-tops L mei/'ed 'fi-em the czmiief-hiis l n, li'ieiallj! until diseiigsf. er# ings, TG hold ihf together si; some point on qhe esriefc her,

thereby opening up gaps et ether points which may pei-mii im ohjeetiohehle leakage of fuel. "The ends the spacing 'plaies ae beveled si; ie tsp, shown, to meid inter- 'feiense with the'csri'icrimr ings fifi?.

The gimetop plates, et she eiids of -he cn r1iei-o:uis Lili, somewhat diiieent from the intermedia/ie platea-and the carriehzirs at suoli poinis :im modified orrespondngiy. These endpiates are provided their iniiei` sides with depending fins 52, notched or recessed to sraddle the osi-fier bai' hut are not iutoi'locked therewith as are he other plates, while at their outer sides the fins ere omitted and the bodies of the pistes simply iest on the emiieihsrs. Each end plate is held in 'piece hy s heit oitei'iding loosely through :1m apeime' in. the plate and su opening in the han, lem'een he bottom of he bei' and he mit on the hoh; is s spring, preferably iii i-iie fowii of s spring Washei, as 55., This mode @if zimohmeiit gives she end-plaie n certain resiliency oi yield, the hoit i'oeling ous'srdly on ihe carrier-hei" in ,response to pressure that muy develop from. lateral exime fon oi" eiowdihg of iiieerinediete plais ius pieveiiisg breakage 'When specie@ de ces, as Sie *ai with ihtarmedie tes, bodily disolseemeii'; me the does ses oeeisf d excessive piessufe is less iilely7 hut are emia'eed, es may insdverence in meh y eoiiiiecion of the ,whats eiofds a, Wide t the inconvenience giieiii hieelmge diie mts, i-he esmhinsion isveise ceiiei hsi's ends io form i1, grate-inps 1e hal-s, hav-- s dush with eeoh 1 mnd-e, in eoirihmstion, wr, sei'ies oin grits-tops me @ermee-Dei' and es wizh evermppmg; sehzihly securing the mi 3., ln a traveling' grate, e pelfora'ted grate-top plate substantially rectangular in plan, provided with depending Webs or ns :l its elcles lle-ying undercut receeeee provcl ing undercut lont :mil rear lugs, end provided et its sclee with outwardly extending ribs to overlap emlle' lbe on elle edj'eeen; plates when a Series of Snell platee ere el ranged side by side lo *lle gmte. l

ln e traveling grate, the combination olf e bouleverse carrier-bel", e series of nter mediate grate-top plates arranged eide by eide on the carrier ber, an enlplnte on 'elle `omieli-5mn et the end of the series of inten mediale plates; and means for seem-ing the enilepleteson the carrier-bmj5 comprising e device eonneoteel loosely at ite lower enel to the eerrierebar enel extending upwardly into loose mnneoon with the end-plete, and. sp1-ing; means yelflin'gly opposing outward looking movement of 'the seid upwardly ex- L-ei ing device under *pressure exerted lee erelly on elle enclple;e by the intermediate platee 5. lo e traveling graine? in combination, e erensverse eender-loer, e series of grate-top gletes arranged side by scle on lle eerlebe?? laterally removable enel-plaies on the eerder-loer ai; the end of: eeicl series, end means 1for fastening the end-platee o the eerre' bar, comprslng vertical oele loosely conne/ted el the top lao the end pleee end ai; tlae bottom llo elle oarrer-balenel yielding devices between the bolts end the eel-riefbel", to permit laeml rocking movement of 'the bolts undef preeeule on elle end. plaies.

6. ln e traveling grate, e hollow @reneverse Gefrier loer comprising Vertical front and rear Wells spaced. eport, forwardly tending lugs on nhe l'lon Well el; the top thereof enel rearwardly exenelng lugs on the rear well et 'the top thereof, Verieel forwardly extending lns on the lower portion of the front Wall.; enel Vertical Teer- Warclly extending fins on the lower portion of ,the reel' Well.,

'7. ln e traveling gree, lle hollow inane-- verse carrier-loer lll, ooinpleng e one-piece casting having spaced front and fear Wells oonnetecl by integral Webslo? laterally spaced front end. reel lugs 49, :Le falle top ol" the leent end rear Welle and nlegrel there with, strengthening os 45 integral with lle front enel Teer Wells, enel Vertical front and. rear Ens below the seid strengthening lbe and integral with the front enel fezu Walle.

ln testimony whereof l my sgnefure in the presence of two subscribing Witnesses.

KUHN VAN VLECK.

Wlnesses:

FRANK. J. NEWMAN, E. Lomemn. 

